Standardize `params' to `user_info'; #983

We use the term user_info in other accounts elsewhere.
Add comment re: ACTIONS; #983

We don't branch on action in Bountysource like we do with other accounts
elsewhere.
Play whack-a-mole with bountysource/redirect; #983

The code to pre-populate Bountysource accounts with data pulled from
existing social networks seems brittle and error-prone to me. The
problem here is that the 'name' key can be missing from a GitHub
user_info, resulting in a None that we try to .strip. I suspect there's
more problems like this lurking as well.
Fix SyntaxError in take-over.html; #983